DOC AIRBUS | AMM A320FInstallation of the Isolation Units
TASK 23-44-42-400-001-A
Installation of the Isolation Units
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 23-44-42-860-050-A ** ON A/C NOT FOR ALL
Subtask 23-44-42-420-050-A ** ON A/C NOT FOR ALL
Subtask 23-44-42-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:12:15 UTC
Installation of the Isolation Units
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | PLUG - BLANKING, RED |
| FOR [4RJ3] (ISOLATION UNIT) | ||
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| FOR [4RJ4] (ISOLATION UNIT) | ||
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| FOR [4RJ5] (ISOLATION UNIT) | ||
| No specific | 1 | ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14QEB1) | Wire-Locking Dia: 0.6 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 200 | UPPER HALF FUSELAGE |
| FOR [4RJ1] (ISOLATION UNIT) | |
| 822 | |
| FOR [4RJ2] (ISOLATION UNIT) | |
| 824 | |
| FOR [4RJ3] (ISOLATION UNIT) | |
| 131CC | |
| FOR [4RJ4] (ISOLATION UNIT) | |
| 132PW | |
| FOR [4RJ5] (ISOLATION UNIT) | |
| 312AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 23-44-00-700-001-A | Operational Test of the Service Interphone |
| ESPM 204825 | |
| FOR [4RJ1] (ISOLATION UNIT) | |
| TASK 52-41-00-010-002-A | Open the Avionics Compartment Doors for Access |
| FOR [4RJ2] (ISOLATION UNIT) | |
| TASK 52-41-00-010-002-A | Open the Avionics Compartment Doors for Access |
| TASK 52-41-00-410-002-A | Close the Avionics Compartment Doors after Access |
| FOR [4RJ3] (ISOLATION UNIT) | |
| TASK 25-54-12-000-002-A | Removal of the Ceiling Panels in the Forward Cargo Compartment |
| TASK 25-54-12-400-002-A | Installation of the Ceiling Panels in the Forward Cargo Compartment |
| TASK 52-30-00-860-001-A | Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| FOR [4RJ4] (ISOLATION UNIT) | |
| TASK 25-54-12-000-001-A | Removal of the Forward Cargo-Compartment Partition |
| TASK 25-54-12-400-001-A | Installation of the Forward Cargo-Compartment Partition |
| TASK 52-30-00-860-001-A | Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
Isolation UnitSubtask 23-44-42-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) FOR [4RJ1] (ISOLATION UNIT)
(a) Make sure that access door 822 is opened (Ref. AMM TASK 52-41-00-010-002).
(b) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below access door 822.
(2) FOR [4RJ2] (ISOLATION UNIT)
(a) Make sure that access door 824 is opened (Ref. AMM TASK 52-41-00-010-002).
(b) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below access door 824.
(3) FOR [4RJ3] (ISOLATION UNIT)
(a) Make sure that the forward cargo-compartment door is opened and safetied with the actuator safety locks (Ref. AMM TASK 52-30-00-860-001).
(b) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below the opened forward cargo-compartment door.
(c) Make sure that ceiling panel 131CC is removed (Ref. AMM TASK 25-54-12-000-002).
(4) FOR [4RJ4] (ISOLATION UNIT)
(a) Make sure that the forward cargo-compartment door is opened and safetied with the actuator safety locks (Ref. AMM TASK 52-30-00-860-001).
(b) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below the opened forward cargo-compartment door.
(c) Make sure that partition 132PW at FR34 is removed (Ref. AMM TASK 25-54-12-000-001).
(5) FOR [4RJ5] (ISOLATION UNIT)
(a) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below access door 312AR.
(b) Make sure that access door 312AR is opened.
Subtask 23-44-42-865-052-A (1) FOR [4RJ1] (ISOLATION UNIT)
(a) Make sure that access door 822 is opened (Ref. AMM TASK 52-41-00-010-002).
(b) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below access door 822.
(2) FOR [4RJ2] (ISOLATION UNIT)
(a) Make sure that access door 824 is opened (Ref. AMM TASK 52-41-00-010-002).
(b) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below access door 824.
(3) FOR [4RJ3] (ISOLATION UNIT)
(a) Make sure that the forward cargo-compartment door is opened and safetied with the actuator safety locks (Ref. AMM TASK 52-30-00-860-001).
(b) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below the opened forward cargo-compartment door.
(c) Make sure that ceiling panel 131CC is removed (Ref. AMM TASK 25-54-12-000-002).
(4) FOR [4RJ4] (ISOLATION UNIT)
(a) Make sure that the forward cargo-compartment door is opened and safetied with the actuator safety locks (Ref. AMM TASK 52-30-00-860-001).
(b) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position below the opened forward cargo-compartment door.
(c) Make sure that partition 132PW at FR34 is removed (Ref. AMM TASK 25-54-12-000-001).
(5) FOR [4RJ5] (ISOLATION UNIT)
(a) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below access door 312AR.
(b) Make sure that access door 312AR is opened.
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | COM/CIDS/DIR ESS/2 | 157RH | G02 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | COM/CIDS/DIR ESS/1 | 150RH | G01 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | COM DIR ESS/2 | 157RH | G02 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | COM NAV/CIDS/DIR2 ESS | 157RH | G02 |
| 49VU | COM NAV/CIDS/DIR1 ESS | 150RH | G01 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/CIDS/DIR NORM/2 | 156RH | M06 |
| 121VU | COM NAV/CIDS/DIR NORM/1 | 151RH | M05 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/CIDS/DIR NORM/2 | 156RH | M07 |
| 121VU | COM NAV/CIDS/DIR NORM/1 | 151RH | M06 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/CIDS/DIR2 NORM | 156RH | M06 |
| 121VU | COM NAV/CIDS/DIR1 NORM | 151RH | M05 |
Subtask 23-44-42-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Isolation Unit
(1) If necessary, assemble the PC-board (2) to the PC-board bracket (6) and attach it with the nuts (4) and the washers (5).
(2) Put the PC-board bracket (6) together with the PC-board (2) in position to the mounting rail (3).
(3) Put the end-clamuse protective googles a mounting rail (3) and tighten the clamp screw (7).
14QEB1 Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
(5) Prepare the electrical wires and make sure that they are clean and in the correct condition.
(6) Connect the wires of the cable harness (1) to the terminals of the PC-board (2) ESPM 204825.
Subtask 23-44-42-865-051-A (1) If necessary, assemble the PC-board (2) to the PC-board bracket (6) and attach it with the nuts (4) and the washers (5).
(2) Put the PC-board bracket (6) together with the PC-board (2) in position to the mounting rail (3).
(3) Put the end-clamuse protective googles a mounting rail (3) and tighten the clamp screw (7).
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(4) Safety the clamp screw (7) with (5) Prepare the electrical wires and make sure that they are clean and in the correct condition.
(6) Connect the wires of the cable harness (1) to the terminals of the PC-board (2) ESPM 204825.
NOTE: For the correct connection refer to the applicable illustration.
(7) Make sure that the contacts, which are not used, are covered with PLUG - BLANKING, RED. B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 23-44-42-710-050-A ** ON A/C NOT FOR ALL 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | COM/CIDS/DIR ESS/2 | 157RH | G02 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | COM/CIDS/DIR ESS/1 | 150RH | G01 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | COM DIR ESS/2 | 157RH | G02 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | COM NAV/CIDS/DIR2 ESS | 157RH | G02 |
| 49VU | COM NAV/CIDS/DIR1 ESS | 150RH | G01 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/CIDS/DIR NORM/2 | 156RH | M06 |
| 121VU | COM NAV/CIDS/DIR NORM/1 | 151RH | M05 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/CIDS/DIR NORM/2 | 156RH | M07 |
| 121VU | COM NAV/CIDS/DIR NORM/1 | 151RH | M06 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/CIDS/DIR2 NORM | 156RH | M06 |
| 121VU | COM NAV/CIDS/DIR1 NORM | 151RH | M05 |
Subtask 23-44-42-410-050-A ** ON A/C NOT FOR ALL
A. Close Access
(1) FOR [4RJ1] (ISOLATION UNIT)
(a) Close access door 822.
(2) FOR [4RJ2] (ISOLATION UNIT)
(a) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) FOR [4RJ3] (ISOLATION UNIT)
(a) Install ceiling panel 131CC (Ref. AMM TASK 25-54-12-400-002).
(b) Remove the actuator safety locks and close the forward cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
(4) FOR [4RJ4] (ISOLATION UNIT)
(a) Install partition 132PW at FR34 (Ref. AMM TASK 25-54-12-400-001).
(b) Remove the actuator safety locks and close the forward cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
(5) FOR [4RJ5] (ISOLATION UNIT)
(a) Close access door 312AR.
(6) Remove the access platform(s).
(1) FOR [4RJ1] (ISOLATION UNIT)
(a) Close access door 822.
(2) FOR [4RJ2] (ISOLATION UNIT)
(a) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) FOR [4RJ3] (ISOLATION UNIT)
(a) Install ceiling panel 131CC (Ref. AMM TASK 25-54-12-400-002).
(b) Remove the actuator safety locks and close the forward cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
(4) FOR [4RJ4] (ISOLATION UNIT)
(a) Install partition 132PW at FR34 (Ref. AMM TASK 25-54-12-400-001).
(b) Remove the actuator safety locks and close the forward cargo-compartment door (Ref. AMM TASK 52-30-00-860-002).
(5) FOR [4RJ5] (ISOLATION UNIT)
(a) Close access door 312AR.
(6) Remove the access platform(s).